<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JSON响应</title>
    <style>
        .result {
            width: 300px;
            height: 200px;
            border: 1px solid #adadad;
        }
    </style>
</head>
<body>
    <div class="result"></div>
    <script>
        const result = document.querySelector(".result");
        window.addEventListener('keydown',function(){
            const xhr = new XMLHttpRequest();
            // 设置响应体数据类型
            xhr.responseType = 'json';
            xhr.open('GET','http://127.0.0.1:8000/json-server');
            xhr.send();
            xhr.onreadystatechange = function(){
                if (xhr.readyState === 4) {
                    if (xhr.status >= 200 && xhr.status < 300);
                    // result.innerHTML = xhr.response;
                    // 手动转化数据类型
                    // let data = JSON.parse(xhr.response);
                    console.log(xhr.response);
                    result.innerHTML = xhr.response.name;
                }
            }
        })
    </script>
</body>
</html>